First, please take knowledge that only the
new messages received while whatsapp is closed will appear in the application.
If you are still having a problem please make sure that:
1- You did not mute the relative conversation in WhatsApp.
Private Read needs to receive notifications from WhatsApp in order for it to function. If you disable WhatsApp notifications or muted the conversaion, please unmute and try again.
2- You have provided all the required permissions to the application, especially the notifications listener notification that is promted when you start the application.
To give this permission please follow the below steps: